Elementary algebra is the most basic form of algebra. 1  It is taught to students who are presumed to have no knowledge of mathematics beyond the basic principles of arithmetic. In arithmetic, only numbers and their arithmetical operations (such as +, â, Ã, Ã·) occur.
When using vinyl masking as a stencil, allow the etching cream to remain on the glass for 5 minutes.After 5 minutes, use water to rinse off the etching cream. Rinse from the top of the project down, work quickly and use your brush to help.
The idea of etching is that you create âgroovesâ or recessed marks in a flat metal plate using acid (I use copper, but zinc and other metals can be used as well). Ink is rubbed into the âgroovesâ and then using an etching press, pushed into damp paper. The first step I use in creating my plates is using a substance called âhardground.â Hardground is a liquid that dries pretty fast (There are other solid forms, but I like the liquid). It resists acid.